Woodward 2301E-ST, Installation And Operation Manual

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Manual 26694 2301E-ST
Woodward 96
Symptom Cause Solution
Prime mover will not start.
Actuator not moving to start
steam position.
If the actuator moves to
start position, a problem
with the prime mover
steam supply is indicated.
Supply voltage polarity reversed (dc
only), or no supply voltage. On power up the CPU status LED
should come on for 30 seconds.
Check for proper voltage from terminals
48(+) to 49(–). Reverse leads if polarity
is incorrect.
Actuator not responding to input signal
from control.
The hydraulic actuator must have oil
pressure and gear rotation to operate
(respond).
If there is a voltage output at control
terminals 13(+) and 14(–), but the
actuator does not move, the wiring to
the actuator should be checked for
opens or shorts. With the EG3P
actuator, remember that terminals C and
D of the mating plug should be
jumpered.
Make resistance checks at the actuator.
Coil resistance on Woodward actuators
is approximately 35
Ω . (Read with leads
at terminals 13 and 14 disconnected.)
Shutdown cause. Check Shutdown status in the Service
Menu C** SHUTDOWN** #01. If the
status is TRUE, check all Shutdown
causes; release each cause one by one.
(See Chapter 3)
Actuator or linkage. Check actuator or linkage for proper
installation and operation. Problems
may be oil supply, direction of rotation,
insufficient drainage, linkage, worn
actuator components, or improper
adjustment.
No actuator voltage at terminals 13 and
14. Check for shorted or grounded actuator
leads by removing wires to terminals 13
and 14. Stop prime mover. Check for 18
to 24 V at terminals 13 and 14.
Check that A**DISPLAY ANALOG
INFO** Menu is reading the turbine
speed during spinning. If no speed-
reading, check the MPU.
Released